Stars kept Thor 2 plot under wraps

Tom Hiddleston reprises the role of Loki in Thor: The Dark WorldKat Dennings said she was good at keeping the film's secretsAnthony Hopkins joined co-star Tom Hiddleston at the Hollywood premiereJaimie Alexander wore a revealing black dress to the screeningChris Hemsworth was joined by his brother Liam Hemsworth at the premiereTom Hiddleston is back as Loki in Thor: The Dark World